Apparatus for providing multiple screens and method of dynamically configuring screens

ABSTRACT

An apparatus for providing multiple screens and a method of dynamically configuring multiple screens are provided. The apparatus for providing multiple screens is capable of providing a plurality of contents on a single physical display device and reconstructing a form or connection relationship among screens existing on a system. The apparatus for providing multiple screens includes an operation module which generates at least one screen for displaying a service and a setting module which senses a change of set of the screen.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application claims priority from U.S. Provisional Patent Application Nos. 60/705,491, 60/789,577 and 60/812,090 filed on Aug. 5, 2005, Apr. 6, 2006 and Jun. 9, 2006, respectively, in the United States Patent and Trademark Office, the disclosures of which are incorporated herein by reference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

Apparatuses and methods consistent with the present invention relate to providing and dynamically configuring multiple screens, and more particularly, to providing a plurality of contents on a single physical display device and reconstructing a form or connection relationship among screens existing on a system.

2. Description of the Related Art

Related art broadcast receivers such as digital televisions (TVs) or digital set-top boxes provide only one content element on a single physical display device or simultaneously display a main screen and a sub-screen on a single physical display device.

Even though related art broadcast receivers can simultaneously display both the main screen and the sub-screen on the same display screen, they can only arrange the main screen and the sub-screen in a limited number of manners. In the case of a content displayed within the main screen, all elements of the content, i.e., video data, audio data, and other data, are displayed. On the other hand, in the case of a content displayed within the sub-screen, only some of the elements of the content are displayed.

Content sources include a broadcast service such as a satellite broadcaster, a terrestrial broadcaster, or a cable broadcaster, a storage medium such as digital versatile discs (DVDs), or an external device connected to an input terminal. However, it is quite difficult to display contents provided by such various content sources on a display screen using the existing broadcast receivers.

In an interactive TV application program environment such as the Multimedia Home Platform (MHP), the Advanced Common Application (ACAP), and the Open Cable Application Platform (OCAP), it is assumed that only one screen is output on a physical display device.

In the interactive TV application program environment, for example, a Home Audio/Video Interoperability (HAVi)-based user interface (UI) is adopted. According to the HAVi UI standard, even though no restriction is imposed on the number of screens displayed on a physical display device, only one screen is generally displayed on a physical display device.

In such an environment, it is difficult to perform operations, such as decoding, digital signal processing, user interaction processing, etc. with respect to one among multimedia contents displayed on a screen while displaying the multimedia contents on independent screens. In addition, it is also difficult to dynamically control the life cycles of application programs and the use of resources in the units of the screens.

Accordingly, there exists a need for a method of displaying a variety of contents on a dynamically configured screen.

SUMMARY OF THE INVENTION

The present invention is provides an apparatus and method for dynamically configure multiple screens which provide a plurality of contents on a single physical display device so as to reconstruct a form or connection relationship among screens existing on a system.

According to an aspect of the present invention, there is provided an apparatus for providing multiple screens, apparatus including an operation module generating at least one screen for displaying a service; and a setting module sensing a change of set of the screen.

According to another aspect of the present invention, there is provided an apparatus for providing multiple screens, the apparatus including an operation module generating at least one screen for displaying a service; and a setting module changing coordinates or a size of the screen.

According to still another aspect of the present invention, there is provided an apparatus for providing multiple screens, the apparatus including a service processing module generating a logical screen for displaying a service and a display screen that the logical screen is mapped; and a setting module changing an order of displaying the logical screen on the display screen.

According to a further aspect of the present invention, there is provided an apparatus for providing multiple screens, the apparatus including a service processing module generating a logical screen for displaying a service and a display screen that the logical screen is mapped; and a setting module disposing the logical screen on the display screen according to a disposing method among one or more disposing methods.

According to yet another aspect of the present invention, there is provided an apparatus for providing multiple screens, the apparatus including an operation module generating at least one screen for displaying a service; and a setting module restricting to perform an application included in the service on the screen.

According to yet another aspect of the present invention, there is provided a method of providing multiple screens, the method including generating at least one screen for displaying a service; and sensing a change of set of the screen

According to yet another aspect of the present invention, there is provided a method of providing multiple screens, the method including generating at least one screen for displaying a service; and changing coordinates or a size of the screen.

According to yet another aspect of the present invention, there is provided a method of providing multiple screens, the method including generating a logical screen for displaying a service and a display screen that the logical screen is mapped; and changing an order of displaying the logical screen on the display screen.

According to yet another aspect of the present invention, there is provided a method of providing multiple screens, the method including generating a logical screen for displaying a service and a display screen that the logical screen is mapped; and disposing the logical screen on the display screen according to a disposing method among one or more disposing methods.

According to yet another aspect of the present invention, there is provided a method of providing multiple screens, the method including generating at least one screen for displaying a service; and restricting to perform an application included in the service on the screen.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which:

FIGS. 1A to 1H are diagram illustrating a configuration of a PiP screen according to an exemplary embodiment of the present invention;

FIG. 2 is a diagram illustrating the relationship between a logical screen and a display screen according to an exemplary embodiment of the present invention;

FIGS. 3A to 3E are diagrams illustrating a configuration of a screen including a mapper according to an exemplary embodiment of the present invention;

FIG. 4 is a block diagram illustrating service sources according to an exemplary embodiment of the present invention;

FIGS. 5A and 5B are diagrams illustrating a non-abstract service and an abstract service according to an exemplary embodiment of the present invention;

FIG. 6 is a diagram illustrating attribute information and interfaces of a logical screen and a display screen;

FIG. 7 is a diagram illustrating an attribute ‘z-order’ of a logical screen according to an exemplary embodiment of the present invention;

FIGS. 8A and 8B are diagrams each illustrating an attribute ‘Display_Area’ of a logical screen according to exemplary embodiments of the present invention;

FIG. 9 is a diagram illustrating a method of mapping two services to a display screen according to an exemplary embodiment of the present invention;

FIG. 10 is a block diagram illustrating a configuration of an apparatus for providing multiple screens according to an exemplary embodiment of the present invention;

FIG. 11 is a flowchart illustrating a method of dynamically configuring multiple screens according to an exemplary embodiment of the present invention;

FIG. 12 is a diagram illustrating software architecture for providing multiple screens according to an exemplary embodiment of the present invention;

FIG. 13 is a diagram illustrating the relationships among modules constituting an application programming interface (API) layer according to an exemplary embodiment of the present invention;

FIG. 14 is a flowchart illustrating a method of displaying a plurality of services that are displayed on respective corresponding logical screens on a display screen by the modules illustrated in FIG. 13 according to an exemplary embodiment of the present invention;

FIG. 15 is a state diagram illustrating the operation of the setting module according to an exemplary embodiment of the invention;

FIGS. 16A to 16E are views illustrating an example of codes for setting the screen according to an exemplary embodiment of the invention; and

FIG. 17 is a flowchart illustrating the process of exchanging the services to be displayed on the logical screen by the modules shown in FIG. 13 according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENT OF THE INVENTION

Advantages and features of the present invention and methods of accomplishing the same may be understood more readily by reference to the following detailed description of exemplary embodiments and the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art, and the present invention will only be defined by the appended claims. Like reference numerals refer to like elements throughout the specification.

The present invention is described hereinafter with reference to flowchart illustrations of user interfaces, methods, and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations, and combinations of blocks in the flowchart illustrations, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which are executed via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart block or blocks.

These computer program instructions may also be stored in a computer usable or computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer usable or computer-readable memory produce an article of manufacture including instruction means that implement the function specified in the flowchart block or blocks.

The computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions that execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

Each block of the flowchart illustrations may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of the order. For example, two blocks illustrated in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.

For a better understanding of the present invention, the terms used in this disclosure will now be defined.

The term ‘service’ indicates a group of multimedia contents displayed together, i.e., a group of service components.

Service components are elements of a service and include a video component, an audio component, and a data component. A data component is an application in a service.

Further, the applications are classified into an unbound application and a service bound application. Since the unbound application has a high priority, the resource is smoothly allocated. A monitor application corresponds to a specific unbound application that has the highest priority.

The service bound application is associated to a transport stream, and allows a lower priority than that of the unbound application. The service bound application does not function as a critical system. When a competition for resources is occurred, the service bound application has a larger possibility of abandoning the resource allocation than the unbound application. The service bound application includes a conjunction type that operates in conjunction with a stream that is being transported and a non-conjunction type that operates dependently from the stream.

The term ‘service context’ indicates an object which can control the executing of a service and includes various resources, devices, and execution state information needed for providing a service.

The term ‘physical display device’ indicates a physical space which actually displays the content of a service.

The term ‘display screen’ indicates a screen actually displayed on a physical display device. An arbitrary service may be directly set in the display screen, and the display screen may be displayed on a physical display device. Alternatively, at least one logical screen which is mapped to a certain area of the display screen may be displayed on the physical display device.

The term ‘logical screen’ indicates a space in which an arbitrary service is displayed. A logical screen is a virtual screen before being mapped to a display screen and thus is not displayed on a physical display device.

The logical screen and the display screen may be a combination of a background still image, a video raster, and a graphic raster. The graphic raster may be a combination of text, lines, colors, and images or a mixture of video frames.

The term ‘main service’ indicates a service that is selected as a main service through a menu displayed on the physical display device or a remote controller by a user or through an API by an application, and the screen on which the main service is displayed is referred to as a ‘main screen’.

The term ‘Picture-in-Picture service’ (PiP service) indicates a service that is selected as a sub-service in the main service through a menu displayed on a physical display device or a remote controller by a user via an API by an application, and the PiP service may be displayed on a picture-in-picture screen (PiP screen) or a main screen.

The PiP screen includes a screen that occupies a part of another screen as illustrated in FIGS. 1A to 1D and a screen that is simultaneously displayed with another screen without overlapping the other screen as illustrated in FIGS. 1E to 1F. In this case, it is understood that the PiP screen may include a screen that is displayed on an arbitrary location or area in the physical display device or overlaps another screen, as illustrated in FIGS. 1G and 1H.

FIG. 2 is a diagram illustrating the relationship between a logical screen and a display screen according to an exemplary embodiment of the present invention.

Referring to FIG. 2, a service may be displayed using logical screens 210, 212, and 214. The logical screens 210, 212, and 214 are mapped to display screens 220, 222, and 224 through a mapping block 230.

In detail, the logical screens 210 and 212 are mapped to the display screen 220, the logical screens 212 and 214 are mapped to the display screen 222, and the logical screens 210, 212, and 214 are mapped to the display screen 224.

In short, at least one logical screen which displays a service is mapped to an arbitrary area of a display screen.

The mapping block 230 is a group of various pieces of information needed for mapping a logical screen to a display screen. Examples of the various pieces of information include coordinate information of a predetermined area on a display screen to which each of a plurality of logical screens is mapped, identification information of the logical screens and the display screen, and information specifying in what order the logical screens are displayed on the display screen.

The mapping block 230 can change the size of the logical screen so to be allocated in an arbitrary area of the display screen. That is, the mapping block 230 can perform scaling of the logical screen and allocating of the position thereof, and FIGS. 3A to 3E are diagrams illustrating a configuration of the screen including a mapper as the mapping block.

Referring to FIG. 3A, the main screen including a combination of a background still image B, a video raster V, and a graphic raster G is mapped to the entire display screen by a mapper with a normal size. The PiP screen including only video components is mapped to the entire display screen by the mapper with a reduced size. In this case, the mapped PiP screen is displayed on the main screen, which is determined depending on a Z value. The reference character Z refers to z-order value which will be described later. An overlay screen may be combined with the display screen. The overlay screen is a specific screen disposed at the outmost side, and may be used when providing a caption function. The PiP screen may have only a video component as illustrated in FIG. 3A, or may have a combination of the background still image B, the video raster V, and the graphic raster G as illustrated in FIG. 3B.

Referring to FIG. 3C, the main screen including the combination of the background still image B, the video raster V, and the graphic raster G is mapped to the entire display screen by the mapper with a normal size. Two PiP screens #1 and #2 having only video component is mapped to an arbitrary area of the display screen by the mapper with a reduced size. In this case, the mapped PiP screen is disposed on the main screen and the Z value can be constantly maintained. Further, the overlay screen may be combined with the display screen. The configuration of the screen may have a plurality of PiP screens including only video components as illustrated in FIG. 3C or a plurality of PiP screens including a combination of the background still image B, the video raster V, and the graphic raster G as illustrated in FIG. 3D.

Picture-outside-Picture (POP) screens are illustrated in FIG. 3E. It can be understood that the conventional PiP screen is displayed inside the main screen and the POP screen is displayed outside the main screen. Referring to FIG. 3E, the plurality of PiP screens #1 and #2 including a combination of the background still image B, the video raster V, and the graphic raster G are mapped to arbitrary areas of the display screen by the mapper with a reduced size. In this case, the Z value of the mapped POP screens #1 and #2 may be constantly maintained. Further, the overlay screen may be combined with the display screen.

The mapping block 230 may be realized by interfaces or functions prepared by various computer program languages to be executed and create or change the relationship between the logical screen and the display screen by using the above information as parameters.

Also, the mapping block 230 may be realized by a hardware which has a mapping function between a logical screen and a display screen.

Further, services provided by various service sources may be displayed on a display screen, and the display screen may be displayed on a physical display device, as illustrated in FIG. 4.

There are service sources which provide broadcast services such as a terrestrial broadcaster 320 and a cable broadcaster 330, service sources which provide services stored in a storage medium such as a personal video recorder (PVR) 340, and service sources (not illustrated in FIG. 4) which provide services via a wired network or a wireless network.

A broadcast receiver 310 receives services from the service sources and generates logical screens displaying each of the a services.

Then, an arbitrary service is directly set on the display screen to be displayed on a physical display device using a predefined method or a method set by a user or an application. Otherwise, at least one logical screen that is mapped to an arbitrary area on the display screen is displayed on a physical display device 350. In short, services provided by the terrestrial broadcaster 320, the cable broadcaster 330, and the PVR are displayed on the physical display device 350.

The terrestrial broadcaster 320, the cable broadcaster 330, and the PVR 340 are illustrated in FIG. 4 as being service sources, but the present invention is not limited to it. Any type of multimedia content source which provides multimedia contents that can be displayed together can be a service source according to an exemplary embodiment of the present invention.

Services according to an exemplary embodiment of the present invention can be classified into abstract services and non-abstract services, as illustrated in FIGS. 5A and 5B.

The abstract services are not services provided by broadcast signals transmitted in real time but services independent of broadcast channels. The abstract services include only data components, i.e., applications, without video components and audio components. Examples of the abstract services include services having unbound applications based on the OCAP standard.

The non-abstract services are understood as services other than abstract services.

According to the current exemplary embodiment of the present invention, both abstract services and non-abstract services have independency. For example, abstract services may be directly set on the physical display device not through logical screens and non-abstract services may be displayed on the logical screens. Then, the logical screens may be mapped to the display screen in which the abstract services are set. Thereafter, the display screen may be output through the physical display device. By doing so, the abstract services can be displayed on the display screen independently of the non-abstract services. In addition, the abstract services and non-abstract services may be mapped to different logical screens. Thereafter, the logical screens may be mapped to a single display screen. In other words, the abstract services can be displayed on the display screen independently of non-abstract services.

According to the current exemplary embodiment of the present invention, the logical screen and the display screen may be categorized as being different objects. Alternatively, a screen may serve as a logic screen or a display screen according to attribute information of one screen object.

In detail, whether a screen object is a logical screen or a display screen depends on the ‘type’ information among screen object attributes.

The screen object attributes includes ‘Type’, ‘z-Order’, ‘Display_Area’, ‘Visibility’, ‘Associated_Display_Screen’, ‘Associated_Service_Contexts’, and ‘OutputPort’.

FIG. 6 illustrates attribute information of a screen object and interfaces for processing the attributes of the screen.

An attribute ‘Type’ 510 is for determining a screen type—a logical screen or a display screen.

An attribute ‘z-Order’ 520 is for determining in what order a plurality of logical screens are arranged along the z-axis. FIG. 7 illustrates a configuration of logical screens on a physical display device for a combination of the values of attributes ‘z-Order’ of the logical screens.

Referring to FIG. 7, first and second logical screens 620 and 630 are respectively mapped to predetermined areas of a display screen 610. In detail, the first logical screen 620 is displayed on the display screen 610, and the second logical screen 630 is displayed on the display screen partially overlapping the first logical screen 620. In other words, the display screen 610, the first logical screen 620, and the second logical screen 630 are sequentially arranged in the direction of the z-axis. In this case, an attribute ‘z-Order’ of the first logical screen 620 may be set to a value of 1, and an attribute ‘z-Order’ of the second logical screen 630 may be set to a value of 2. The attributes ‘z-Order’ of the first and second logical screens 620 and 630 may be set to any numbers or characters as long as they can represent a certain order in which the first and second logical screens 620 and 630 are to be arranged along the z-axis.

An attribute ‘Display_Area’ 530 is information regarding a display screen area of a logical screen, as to be illustrated in FIGS. 8A and 8B.

FIG. 8A illustrates that a logical screen 710 is mapped to an entire area of the display screen 720, and FIG. 8B illustrates that a logical screen 730 is mapped to a partial area of the display screen 740.

The attribute ‘Display_Area’ may include information specifying the two-dimensional coordinates of a predetermined portion of a display screen to which the logical screen is to be mapped or may include information specifying a predetermined location on the display screen and an offset value indicating how much the logical screen deviates from the predetermined location on the display screen.

An attribute ‘Visibility’ 540 determines whether a logical screen is to be visibly or invisibly displayed on a display screen. It is possible to make a logical screen appear on or disappear from a display screen by altering the value of the attribute ‘Visibility’ 530.

An attribute ‘Associated_Display_Screen’ 550 is information regarding display screens associated with a logical screen. A logical screen which is not associated with any display screens may not be displayed on a physical display device nor be transmitted to external output devices.

An attribute ‘Associated_Service_Contexts’ 560 is information regarding service contexts connected to a logical screen or a display screen. Services set in such service contexts may be displayed on a logical screen or a display screen.

An attribute ‘OutputPort’ 570 is information regarding devices by which a display screen is to be output, and such devices include display screens, wired/wireless communication media, and various storage media.

Interfaces for identifying or altering the values of the attributes illustrated in FIG. 6 may be provided. Referring to FIG. 6, the interfaces may include an interface ‘SET’ for setting attribute values or connecting a logical screen to a display screen, an interface ‘ADD’ for adding attribute values or connecting a logical screen to a service, an interface ‘GET’ for identifying attribute values, and an interface ‘REMOVE’ for deleting attribute values. These interfaces may include processes, functions, procedures, or methods that perform their functions, respectively.

For example, a method ‘getDisplayScreen(void)’ returns a display screen associated with the current screen. In detail, if the current screen is a logical screen, the method ‘getDisplayScreen(void)’ returns the associated display screen. If the current screen is display screen, the method ‘getDisplayScreen(void)’ returns reference information regarding the current screen. Further, if the current screen is a logical screen, but there is no associated screen, the method ‘getDisplayScreen(void)’ returns a value of ‘NULL’.

According to another example, a method ‘public void setDisplayArea(HScreenRectangle rect) throws SecurityException, IllegalStateException’ provides a function for mapping the current logical screen to a predetermined area of the associated display screen. An instance that is provided as a parameter is of a class ‘HScreenRectangle’ of a package ‘org.havi.ui’, and has two-dimensional position information. The execution of the methods ‘SecurityException’ and ‘IllegalStateException’ may be conducted as an exceptional operation for the method ‘setOutputScreen(HScreen screen)’. The method ‘IllegalStateException’ may be executed when the current screen is a logical screen or when a portion of a display screen associated with a current logical screen cannot change due to the characteristics of a host platform.

According to still another example, a method ‘getOutputArea(void)’ returns regional information of a current screen as HScreenRectangle information. If the current screen corresponds to a display screen, the method ‘getOutputArea(void)’ returns HScreenRectangle information having the same value as HScreenRectangle (0,0,1,1). If the current screen is a logical screen, the method ‘getOutputArea(void)’ returns information regarding an area on a display screen occupied by the current screen. If the current screen is a logical screen but is not associated with any display screen, the method ‘getOutputArea(void)’ returns a value ‘NULL’.

Certain terms are used throughout the following description to refer to particular interfaces. However, one skilled in the art will appreciate that a particular function is named simply to indicate its functionality. This detailed description of the exemplary embodiments does not intend to distinguish between functions that differ in name but not function.

FIG. 9 is a diagram illustrating a process that two services are set on two logical screens to be mapped to a single display screen.

Referring to FIG. 9, a first service includes all the three service components, i.e., video, audio, and data components, and a second service includes only video and audio components. However, the present invention does not impose any restrictions on service components, and the first and second services illustrated in FIG. 9 are exemplary.

As illustrated in FIG. 9, the first and second services are displayed on a physical display device in almost the same manner as in the related art. According to the current exemplary embodiment of the present invention, it is possible to display a plurality of services on a physical display device independently of one another without imposing any restrictions on the number of services that can be displayed on a single display screen.

FIG. 10 is a block diagram of an apparatus for providing multiple screens according to an exemplary embodiment of the present invention.

Referring to FIG. 10, an apparatus 900 for providing multiple screens includes a digital signal processing module 940, an operation module 970, a user/application interface module 950, and a setting module 960.

Also, the apparatus 900 includes a broadcast signal reception module 910, a storage medium 920 a, and an external input module 930 as service sources, and includes a physical display device 970, a storage medium 980, a storage medium 920 b, and an external output module 990 as service output media.

The term ‘module’, as used herein, means, but is not limited to, a software or hardware component, such as a Field Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC), which performs certain tasks. A module may advantageously be configured to reside on the addressable storage medium and configured to execute on one or more processors. Thus, a module may include, by way of example, components, such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functionality provided for in the components and modules may be combined into fewer components and modules or further separated into additional components and modules.

The digital signal processing module 940 receives various information of a service such as a multimedia content, e.g., video information, audio information, or data information, from the broadcast signal reception module 910, the storage medium 920 a, or the external input module 930.

The broadcast signal reception module 910 receives a satellite, terrestrial, or cable broadcast signal and transmits the received broadcast signal, the storage medium 920 a stores video information, audio information, or data information of a service, and the external input module 930 receives video information, audio information, or data information of a service from an external device such as a network interface module connected to a network.

The digital signal processing module 940 restores a plurality of services using received service components. The restored services include abstract or non-abstract services.

Here, the phrase ‘a plurality of services’ refers to two or more services transmitted by the broadcast signal reception module 910 or two or more services respectively transmitted by the broadcast signal reception module 910 and the storage medium 920 a.

The digital signal processing module 940 may restore services according to selection by a user or an application with the aid of the user/application interface module 950. In this case, the user or the application may select the connection between an arbitrary service and a screen.

The operation module 970 displays a service restored by the digital signal processing module 940 and then maps a logical screen to a display screen or directly the service on the display screen. For this purpose, the operation module 940 may include a service processing module 972 or an output module 974.

The service processing module 972 generates one or more logical screens to display the services restored by the digital signal processing module 940.

The output module 974 maps a plurality of logical screens generated by the service processing module 972 to the display screen. The mapping of the logical screens to the display screen may be conducted using a predefined method or a method set by the user with the aid of the user/application interface module 950.

A service restored by the digital signal processing module 940 may not be processed by the service processing module 972. Instead, a service restored by the digital signal processing module 972 may be directly mapped to a certain portion of a display screen generated by the output module 974.

A display screen provided by the output module 974 may be displayed on the physical display device 980 or may be stored in the storage medium 920 b. Examples of the storage medium 920 b include computer readable floppy discs, hard discs, CD-ROM. DVD, DVD-ROM, BD (Blu-ray Disc), and semiconductor memories.

Also, a display screen provided by the output module 974 may be transmitted to an external device connected to a network via the external output module 990.

For this, the output module 974 may include a plurality of output ports via which a display screen can be provided. In this case, a display screen can be provided via an output port set in advance as a default or an output port chosen by the user with the aid of the user/application interface module 950.

The setting module 960 sets forms of the screens existing on the system and connection relationship thereof. Here, the term ‘set’ means to reconstruct the forms of the generated display screens and the connection relationship thereof. In order to set the forms and the connection relationship, the setting module 960 can sense a change of the set of the screen.

Here, the screen includes a logical screen on which the service is displayed and a display screen that is mapped with the logical screen. The change of the set includes any one of a change of a default screen on which the application is performed, a change of contexts of a service connected to the screen, a change of the display screen, a change of coordinates of a region where the logical screen is mapped in a region of the display screen, a change of a video port of the screen, a change of visibility of the screen, or a change of an order of displaying the logical screen.

The setting module 960 performs sets to change the coordinates or the size of the screen (hereinafter, referred to as ‘first set’), to change the order of displaying the logical screen on the display screen (hereinafter, referred to as ‘second set’), to change the method of disposing the screen (hereinafter, referred to as ‘third set’), and to restrict the execution of the application on the screen (hereinafter, referred to as ‘fourth set’).

When the first set is performed, the setting module 960 can change the coordinates of the region where the logical screen is mapped among the display screen region and the size of the logical screen.

When the third set is performed, the setting module 960 can dispose the logical screen on the display screen region according to at least one disposing method.

The disposing methods include: a first disposing method of displaying the service on the display screen; a second disposing method in which the display screen according to the first disposing method exists with at least one overlapped screen; a third disposing method in which the screen on which the service is displayed corresponds to a logical screen that is mapped with overall regions of the display screen, the screen on which the service is displayed corresponds to at least one non-overlapped logical screen mapped with the display screen, and the screen on which the service is displayed does not correspond to the overlapped screen; a fourth method in which the screen according to the third method exist with at least one overlapped screen; a fifth method in which the screen on which the service is displayed corresponds to at least two non-overlapped logical screens mapped with the overall region of the display screen but does not correspond to the overlapped screen; a sixth method in which the screen according to the fifth method exists with at least one overlapped screen; and a seventh method in which the screen on which the service is displayed does not included in any one of the above-described methods.

The setting module 960 can dispose the screen with reference to a right range of applications included in the service. That is, only when the right for changing the disposing method is given to the application, the setting module 960 can change the screen disposing method. The right can be given to the application by a service provider who supplies the corresponding service.

When the fourth set is performed, the setting module 960 can ignore signals included in the service. That is, even though a signal indicating that the application may be performed on the screen is included in the service, the setting module 960 can restrict the execution of the application on the screen.

On the other hand, the setting module 960 is performed according to an application provided from the service provider or a user control command.

The user or the application can choose one of a plurality of services or restore desired services using the user/application interface module 950. Also, the user can select one of a plurality of display screens using the user/application interface module 950. In order to perform the selection, the user/application interface module 950 can user the setting module 960.

Since the modules illustrated in FIG. 10 are divided according to their functions, it is possible to be connected to the other modules.

FIG. 11 is a flowchart illustrating a method of dynamically configuring multiple screens according to an exemplary embodiment of the present invention.

In general, video information, audio information, and data information constituting a multimedia content are transmitted in a predetermined format, for example, an MPEG stream format. In operation S1010, an apparatus for providing a service such as a multimedia content service receives video information, audio information, and data information and restores a service based on the video information, the audio information, and the data information. Here, the service restored in operation S1010 may be selected or previously determined by a user or an application. The user may use a menu displayed on the display device or a remote controller to select the connections between an arbitrary screen and a screen. The application may select the connections using an API.

Further, data information includes application information regarding application for a service, and these application information includes signal information indicating whether the application can be executed on a PiP screen. Examples of the application information include am application information table (AIT) based on the MHP standard and an extended application information table (XAIT) based on the OCAP standard. The signal information may be added to the application information.

Thereafter, in operation Si020, the restored service is set such that it can be displayed on a logical screen. In operation S1030, the logical screen is mapped to a display screen. In operation S1040, the display screen is provided to the user using a display screen, a storage medium, or a network.

As described above, in operation S1050, the setting module 960 sets the displayed screen when the logical screen and the display screen are generated, when the logical screen is mapped with the display screen, or when the display screen is displayed. The setting performed by the setting module 960 includes the above-described first set to fourth set and can be performed according to a user control command input through the user/application interface module 950 and a control command of the application that manages the operation of the setting module 960. Since the setting has been described in FIG. 10, the description thereof will be omitted.

The restored service is illustrated in FIG. 11 as being displayed on a physical display device via a logical screen. However, the restored service may be directly displayed on a physical display device without passing through the logical screen.

When the user selects the PiP service, the PiP service is realized in two modes. In the first mode, only video component for PiP service selected on the main screen is provided without creating a separate logical screen for PiP service, that is, PiP screen. In the second mode, a separate logical screen for PiP service is created to provide the PiP service selected on the created PiP screen.

FIG. 11 illustrates a method of mapping only one service to a display screen for simplicity. However, a plurality of services may be mapped to a display screen with or without passing through a plurality of logical screens.

When a display screen is provided to the user in this manner, the user can perform a plurality of services.

FIG. 12 is a diagram illustrating software architecture for providing multiple screens according to an exemplary embodiment of the present invention.

Referring to FIG. 12, software architecture 1100 includes a device driver layer 1110, an API layer 1120, and an application layer 1130.

The device driver layer 1110 receives service components from various multimedia content sources and decodes the received service components. Examples of the received service components include video information, audio information, and data information.

The API layer 1120 generates a logical screen and a display screen and maps a service, the logical screen, and the display screen to one another.

The application layer 1130 provides a user interface so that a user can dynamically configure a logical screen which displays a service or transmits a user command to the API layer 1120 so that the API layer 1120 can execute the user command.

In order to perform the above operations, the application layer 1130 can operate through a currently transferred application or a previously stored application and the screen retrieval operation can be performed by the application layer 1130.

The user enables the device driver layer 1110 with the aid of the application layer 1130 to provide a display screen via a physical display device or to store the display screen in a storage medium 920 b. In addition, the user can enable the device driver layer 1110 to transmit a display screen to an external device via a network.

For this, the device driver layer 1110 may include a plurality of output ports which can provide a display screen. Otherwise, API layer 1120 may include the plurality of output ports.

In order to dynamically configure a plurality of logical screens on a display screen, the API layer 1120 may include a plurality of software modules, e.g., a multiscreen manager module ‘MultiScreenManager’ 1210, a multiscreen context module ‘MultiScreenContext’ 1230, a multiscreen context listener module ‘MultiScreenContextListener’ 1250, and a multiscreen context event module ‘MultiScreenContextEvent’ 1240, as illustrated in FIG. 13.

The multiscreen manager module 1210 manages the multiscreen context module 1230, retrieves for a desired screen, displays information specifying what devices are shared by screens, registers the multiscreen context listener module 1250, or cancels the registration of the screen context listener module 1250.

The multiscreen context module 1230 is an interface object associated with a screen object 1220 and determines whether the screen object 1220 is to become a logical screen or a display screen according to an interface operation performed by the multiscreen context module 1230. Various attributes such as the attributes 510 through 570 illustrated in FIG. 6 may be set in the multiscreen context module 1230. The multiscreen context module 1230 can provide the functions ‘SET’, ‘ADD’, ‘GET’, and ‘REMOVE’ described above with reference to FIG. 6.

When attribute information of the screen object 1220 is altered by the multiscreen context module 1230, the multiscreen context event module 1240 serves as an event class announcing that the attribute information of the screen object 1220 has been changed, and the multiscreen context listener module 1250 serves as a listener interface object which can be realized in a predetermined application class which attempts to receive an event prompted by the multiscreen context event module 1240.

An application 1260 is a module which is driven on the application layer 1130. The application 1260 allows the user to choose a desired service and to freely arrange a plurality of logical screens on a display screen.

In detail, the application 1260 transmits various commands which allow the user to dynamically configure and manage logical screens to the multiscreen manager module 1210, and the multiscreen manager module 1210 controls operations corresponding to the various commands to be executed through the multiscreen context module 1230.

The multiscreen context module 1230 is associated with the screen object 1220 and manages the attribute information of the screen object 1220 illustrated in FIG. 6. In order to manage the attribute information of the screen object 1220, the multiscreen context module 1230 may include a variety of functions or methods.

The multiscreen manager module 1210 may receive service components provided by various service sources from the device driver layer 1110 and perform operations to display the received service components on a logical screen or a display screen.

FIG. 14 is a flowchart illustrating a method of displaying a plurality of services displayed on respective corresponding logical screens by the modules illustrated in FIG. 13 on a display screen according to an exemplary embodiment of the present invention.

Referring to FIG. 14, in operation S1310, the multiscreen manager module 1210 produces a display screen and a number of logical screens corresponding to the number of services to be performed.

In operation S1320, the multiscreen manager module 1210 connects the logical screens to respective corresponding services received from the device driver layer 1110. The multiscreen manager module 1210 may call a method ‘addServiceContext’ for each of the logical screens by setting service context objects of the received services as parameters for the logical screens services. The method ‘addServiceContext’ connects a logical screen to a service and may be provided by the multiscreen context module 1230.

In operation S1330, once the logical screens are connected to the respective services, the multiscreen manager module 1210 connects the logical screens to the display screen. At this time, the multiscreen manager module 1210 may call a method ‘setDisplayScreen’ for each of the logical screens by setting a display screen object to which the logical screens are connected as a parameter. The method ‘setDisplayScreen’ connects a logical screen to a display screen and may be provided by the multiscreen context module 1230.

A method ‘setDisplayScreen’ may be set to ‘public void setDisplayScreen (HScreen screen) throws SecurityException, Illegal StateException’, and this method allows an instance ‘HScreen’ that is provided as a parameter to be associated with the current logical screen. In this case, the instance ‘HScreen’ is preferably a display screen.

A parameter of the method ‘setDisplayScreen(HScreen screen)’ may include a value of ‘NULL’. In this case, when the method ‘setDisplayScreen(HScreen screen)’ is executed without exception handling, the current logical screen is no longer associated with the display screen.

The execution of the methods ‘SecurityException’ and ‘IllegalStateException’ may be conducted as an exceptional operation for the method ‘setDisplayScreen(HScreen screen)’.

The method ‘IllegalStateException’ may be executed when a current screen is a logical screen or when a portion of a display screen associated with a current logical screen cannot change due to the characteristics of a host platform.

In operation S1340, areas on the display screen to which the logical screens are to be respectively mapped are determined. At this time, a predetermined method provided by the multiscreen context module 1230 can be called to determine an area on the display screen where the logical screens are to be displayed.

FIG. 15 is a state diagram illustrating the operation of the setting module 960 according to an exemplary embodiment of the invention. The setting module 960 can perform the first to fourth set operations 1510 to 1540.

In order to perform the above-described set operations, the setting module 960 can sense the change of the set of the screen.

In order to sense the change of the set, the setting module 960 can sense a notified event by using a method ‘notify’. The method ‘notify’ is called when a set of ‘HScreen’ or ‘MultiScreenContext’ of the application is changed and includes a parameter ‘MultiScreenContextEvent’. Therefore, the application should register a listener in order to sense the event of the method ‘notify’.

In order to register or terminate the listener, the setting module 960 can call a method ‘addScreenContextListener’ and a method ‘removeScreenContextListener’. The method ‘addScreenContextListener’ and the method ‘removeScreenContextListener’ are used to register or terminate the listener and include an instance ‘MultiScreenContextListener’ as a parameter.

The parameter ‘MultiScreenContextEvent’ of the method ‘notify’ is a class that inherits ‘java.util.EventObject’ and used to provide the kinds of change as follows. That is, a change of basic HScreen of the application, a change of connected service contexts, a change of connected output HScreen, a change of a designated region in the connected output HScreen, a change of connected video output port VideoOutputPorts, a change of visibility of the screen, and a change of z-order of the screen.

In order to sense the above-described changes, a method ‘getId’ can be used. The method ‘getId’ had a integer data type and returns identifier such as SCREEN_CHANGED, SCREEN_CONTEXT_CHANGED, SCREEN_DISPLAY_AREA_CHANGED, SCREEN_OUTPUT_PORT_CHANGED, SCREEN_DISPLAY_SCREEN-CHANGED, SCREEN_VISIBILITY_CHANGED, and SCREEN_Z_ORDER_CHANGED.

FIG. 16A is a view illustrating an example of codes for sensing the change of the screen set. In FIG. 16A shows that a class ‘AContextListener’ that receives the change of the set is defined, an instance of the defined class is generated, the instance is registered as a listener, and the listener is terminated.

In order to perform the first set operation 1510, the setting module 960 can call a method ‘setDisplayArea’. The method ‘setDisplayArea’ is used to change the coordinates or the size of the screen and can be provided by a class ‘MultiScreenConfigurableContext’.

The method ‘setDisplayArea’ can be represented as a form of ‘void setDisplayArea (org.havi.ui.HScreenRectangle rect) throws java.lang.SecurityException, java.lang.IllegalStateException’ and a logical HScreen is connected to a region of the output HScreen. A parameter ‘rect’ means an instance ‘HScreenRectangle’ that determines the region of the output HScreen corresponding to a region obtained by the logical HScreen.

Further, when a right is not given, an exception ‘java.lang.SecurityException’ can be performed. In addition, when a form of the HSceen does not correspond to ‘SCREEN_TYPE_LOGICAL’, when the region of the output HScreen connected to the logical HScreen can not be changed, or when a system use permanently use a predetermined region of the connected output HScreen, the exception ‘java.lang.IllegalStateException’ can be performed.

FIG. 16B is a view illustrating an example of codes for changing the coordinates or the size of the screen and the code is used when changing the coordinates or the size of the screen. That is, the coordinates and the size of the screen are changed by applying a method ‘setDisplayArea’ of an instance ‘configurableScreen’ of the given class ‘MultiScreenConfigurableContext’.

In order to perform the second set operation 1520, the setting module 960 can call a method ‘setZOrder’. The method ‘setZOrder’ is used to change the z-order of the logical screen, and can be provided from a class ‘MultiScreenConfigurableContext’. The method ‘setZOrder’ can be represent by ‘void setZOrder(int order) throws java.lang.SecurityException, java.lang.IllegalStateException’ and the z-order of the corresponding logical HScreen among the logical HScreen of the same output HScreen The parameter ‘order’ is a positive integer value and means the z-order of the corresponding logical HScreen.

Further, when the right is not given, the exception ‘java.lang.SecurityException’ can be performed. The exception ‘java.lang.IllegalStateException’ can be performed when the form of the HSceen does not correspond to ‘SCREEN_TYPE_LOGICAL’, when the z-order of the corresponding logical HScreen can not be changed, or when the system permanently use the predetermined z-order with respect to the corresponding logical HScreen.

FIG. 16C is a view illustrating an example of codes for changing z-order. That is, in FIG. 16C, z-order of the corresponding logical HScreen is changed to 3 by applying a method ‘setZOrder’ of an instance ‘configurableScreen’ of the given class ‘MultiScreenConfigurableContext’.

In order to perform the third set operation 1530, the setting module 960 can call a method ‘getScreenConfigurations’ a method ‘getScreenConfiguration’, and a method ‘setScreenConfiguration’.

The method ‘getScreenConfigurations’ has a returning data type ‘MultiScreenConfiguration[ ]’ and is used when extracting a screen disposing method provided from a multiple screen providing device 900.

The method ‘getScreenConfiguration’ has a data type ‘MultiScreenConfiguration’ and used when extracting a screen disposing method of a currently activated screen.

When a right is not given to the method ‘getScreenConfigurations’ and the method ‘getScreenConfiguration’, the exception ‘java.lang.SecurityException’ can be performed.

The method ‘setScreenConfiguration’ is used when activating a selected screen disposing method.

The method ‘setScreenConfiguration’ can be represented by a form of ‘public void setScreenConfiguration(MultiScreenConfiguration configuration) throws java.lang.SecurityException, java.lang.IllegalArgumentException, java.lang.IllegalStateException’. A parameter ‘configuration’ means an instance of the ‘MultiScreenConfiguration’ that indicates a screen disposing method to be activated

When the right is not given in the method ‘setScreenConfiguration’, the exception ‘java.lang.SecurityException’ may be performed.

The method ‘getScreenConfigurations’, the method ‘getScreenConfiguration’, and the method ‘setScreenConfiguration’ can be provided by the class ‘MultiScreenConfiguration’. A screen disposing method provided by the class ‘MultiScreenConfiguration includes any one of a form of a single screen that a screen on which an application is performed corresponds to a display screen; a form of overlapped screens that a single screen exists with at least one overlapped screen; a form of a PiP screen that a screen on which an application is performed corresponds to a logical screen mapped to overall region of the display screen, corresponds to at least one non-overlapped logical screen that is mapped to the display screen, and does not correspond to the overlapped screen; a form of overlapped PiP screen that the PiP screen exist with at least one overlapped screen; a form of PoP screen that a screen on which an application is performed corresponds to at least two non-overlapped logical screen combinations mapped to the overall region of the display screen but does not correspond to the overlapped screen; a form of overlapped PoP screen that the PoP screen exists with at least one overlapped screen; and a form that is not included in any one of the above-described forms.

Further, in order to check a detailed set form of the corresponding screen, a search module can call a method ‘getScreenConfigurationType’. Here, the method ‘getScreenConfigurationType’ is used to return a set-form of the currently activated screen and can be provided by a module ‘MultiScreenConfiguration’

For example, the method ‘getScreenConfigurationType’ can be represented by a form of ‘int getScreenConfigurationType( )

{return SCREEN_CONFIGURATION_NON_PIP,

SCREEN_CONFIGURATION_NON_PIP_WITH_OVERLAY,

SCREEN_CONFIGURATION_PIP,

SCREEN_CONFIGURATION_PIP_WITH_OVERLAY,

SCREEN_CONFIGURATION_POP,

SCREEN_CONFIGURATION_POP_WITH_OVERLAY,

SCREEN_CONFIGURATION_GENERAL}‘. The method ‘getScreenConfigurationType’ returns the currently activated screen disposing method in the form of integer data type. Here, the above-described set form corresponds to the single screen, overlapped screen, PiP screen, overlapped PiP screen, PoP screen, overlapped PoP screen, and the general screen.

FIG. 16D is a view illustrating an example of codes for changing a screen on which the service is displayed. After checking whether the form of the currently activated screen is PiP or PoP, the set form is changed on the basis of the check result.

In addition, in order to perform the third set operation 1530, the setting module 960 can call a method ‘getScreens’.

The method ‘getscreens’ is used to return a set of accessible screens and has a data type of the class ‘HScreen’ of a package ‘org.havi.ui. That is, the method ‘getScreens’ returns a set of accessible instance ‘HScreen’. The set of the instance ‘HScreen’ may include an instance ‘HScreen’ returned by a method ‘org.havi.ui.HScreen.getDefaultHScreen’ and the instance ‘HScreen’ returned by the method ‘org.havi.ui.HScreen.getHScreens’.

As described above, the instance ‘HScreen’ to be returned includes all kinds of screen instances that can access the called application. When the application is independently called by a device based on the OCAP standard, the set of the instance ‘HScreen’ may include all kind of screen instances capable of accessing devices based on the OCAP standard.

FIG. 16E is a view illustrating an example of codes for changing the screen disposing method. FIG. 16E shows that the screen is disposed by a method selected by the application among the predetermined PoP screen disposing method.

FIG. 17 is a flowchart illustrating the process of exchanging the services to be displayed on the logical screen by the modules shown in FIG. 13.

In operation S1410, the multiscreen manager module 1210 temporarily terminates a service to be exchanged between two logical screens.

Thereafter, in operation S1420, information regarding the service is exchanged between the two logical screens. At this time, a method ‘removeServiceContext’ and a method ‘addServiceContext’ are called for each of the two logical screens, thereby exchanging service contexts set in the two logical screens between the two logical screens. The method ‘removeContext’ removes a service context connected to a logical screen, and the method ‘addServiceContext’ adds a new service context to a logical screen. The methods ‘removeServiceContext’ and ‘addServiceContext’ may be provided by the multiscreen context module 1230. According to the current exemplary embodiment of the present invention, service information regarding a service connected to logical services is exchanged between the logical services, thereby obtaining the effect of exchanging a main screen and a sub-screen. In addition, according to the current exemplary embodiment of the present invention, even when three or more services are performed on a display screen, they can be exchanged between an arbitrary number of logical screens.

In operation S1430, occurrence of an event in which the connection between the service and the two logical screens has been changed is generated. Thereafter, in operation S1440, the multiscreen context event module 1240 transmits the event to the multiscreen context listener module 1250, and a service newly connected to the two logical screens begins to be performed.

According to the present invention, it is possible for a user to reconstruct a form or connection relationship of screens existing on a system by dynamically configuring the multiple screens that provides a plurality of contents on a single physical display device

While the present invention has been particularly illustrated and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. Therefore, it is to be understood that the above-described exemplary embodiments have been provided only in a descriptive sense and will not be construed as placing any limitation on the scope of the invention. 

1. An apparatus for providing multiple screens, the apparatus comprising: an operation module which generates at least one screen for displaying a service; and a setting module which senses a change of set of the screen.
 2. The apparatus of claim 1, wherein the screen comprises a logical screen connected to an application included in the service and a display screen to which the logical screen is mapped.
 3. The apparatus of claim 2, wherein the operation module disposes the logical screen on which the application is executed on the display screen.
 4. The apparatus of claim 2, wherein the change of the set comprises one of a change of a default screen on which the application is executed, a change of contexts of a service connected to the screen, a change of the display screen, a change of coordinates of a region where the logical screen is mapped in a region of the display screen, a change of a video port of the screen, a change of visibility of the screen, and a change of an order of displaying the logical screen.
 5. The apparatus of claim 1, wherein the screen comprises a Picture-in-Picture screen.
 6. The apparatus of claim 1, wherein the screen comprises a Picture-outside-Picture screen.
 7. An apparatus for providing multiple screens, the apparatus comprising: an operation module which generates at least one screen for displaying received service; and a setting module which changes coordinates or a size of the screen.
 8. The apparatus of claim 7, wherein the screen comprises a Picture-in-Picture screen.
 9. The apparatus of claim 7, wherein the screen comprises a Picture-outside-Picture screen.
 10. The apparatus of claim 7, wherein the screen comprises a logical screen connected to an application included in the service and a display screen to which the logical screen is mapped.
 11. The apparatus of claim 10, wherein the operation module disposes the logical screen on which the application is executed on the display screen.
 12. The apparatus of claim 10, wherein the setting module changes coordinates of a region where the logical screen is mapped in a region of the display screen and a size of the logical screen.
 13. An apparatus for providing multiple screens, the apparatus comprising: a service processing module which generates a logical screen for displaying a service and a display screen that the logical screen is mapped; and a setting module which changes an order of displaying the logical screen on the display screen.
 14. The apparatus of claim 13, wherein the logical screen comprises a Picture-in-Picture screen.
 15. The apparatus of claim 13, wherein the logical screen comprises a Picture-outside-Picture screen.
 16. An apparatus for providing multiple screens, the apparatus comprising: a service processing module which generates a logical screen for displaying a service and a display screen that the logical screen is mapped; and a setting module which disposes the logical screen on the display screen according to a disposing method among a plurality of disposing methods.
 17. The apparatus of claim 16, wherein the disposing methods comprise: a first disposing method of displaying the service on the display screen; a second disposing method in which the display screen according to the first disposing method exists with at least one overlapped screen; a third disposing method in which the screen on which the service is displayed corresponds to a logical screen that is mapped with an overall region of the display screen, the screen on which the service is displayed corresponds to at least one non-overlapped logical screen mapped with the display screen, and the screen on which the service is displayed does not correspond to the overlapped screen; a fourth method in which the screen according to the third method exist with at least one overlapped screen; a fifth method in which the screen on which the service is displayed corresponds to at least two non-overlapped logical screens mapped with the overall region of the display screen but does not correspond to the overlapped screen; a sixth method in which the screen according to the fifth method exists with at least one overlapped screen; and a seventh method in which the screen on which the service is displayed is not included in the first to sixth methods.
 18. The apparatus of claim 16, wherein the logical screen comprises a Picture-in-Picture screen.
 19. The apparatus of claim 16, wherein the logical screen comprises a Picture-outside-Picture screen.
 20. The apparatus of claim 16, wherein the setting module disposes the logical screen with reference to a right range of an application included in the service.
 21. The apparatus of claim 16, wherein the disposing method is selected by the application included in the service or by a user.
 22. An apparatus for providing multiple screens, the apparatus comprising: an operation module which generates at least one screen for displaying a service; and a setting module which restricts execution of an application included in the service on the screen.
 23. The apparatus of claim 22, wherein the screen comprises a Picture-in-Picture screen.
 24. The apparatus of claim 22, wherein the screen comprises a Picture-outside-Picture screen.
 25. The apparatus of claim 22, wherein the setting module restricts the execution of the application included in the service on the screen regardless whether a signal for indicating that the application can be executed on the screen is included in the service.
 26. A method of providing multiple screens, the method comprising: generating at least one screen for displaying a service; and sensing a change of set of the screen.
 27. The method of claim 26, wherein the screen comprises a logical screen connected to an application included in the service and a display screen to which the logical screen is mapped.
 28. The method of claim 27 further comprising disposing the logical screen on which the application is executed on the display screen.
 29. The method of claim 27, wherein the change of the set comprises one of a change of a default screen on which the application is executed, a change of contexts of a service connected to the screen, a change of the display screen, a change of coordinates of a region where the logical screen is mapped in a region of the display screen, a change of a video port of the screen, a change of visibility of the screen, and a change of an order of displaying the logical screen.
 30. The method of claim 26, wherein the screen comprises a Picture-in-Picture screen.
 31. The method of claim 26, wherein the screen comprises a Picture-outside-Picture screen.
 32. A method of providing multiple screens, the method comprising: generating at least one screen for displaying a service; and changing coordinates or a size of the screen.
 33. The method of claim 32, wherein the screen comprises a Picture-in-Picture screen.
 34. The method of claim 32, wherein the screen comprises a Picture-outside-Picture screen.
 35. The method of claim 32, wherein the screen comprises a logical screen connected to an application included in the service and a display screen to which the logical screen is mapped.
 36. The method of claim 35 further comprising disposing the logical screen on which the application is executed on the display screen.
 37. The method of claim 35, wherein the changing of the coordinates or the size of the screen comprises changing coordinates of a region where the logical screen is mapped in a region of the display screen and a size of the logical screen.
 38. A method of providing multiple screens, the method comprising: generating a logical screen for displaying a service and a display screen to which the logical screen is mapped; and changing an order of displaying the logical screen on the display screen.
 39. The method of claim 38, wherein the logical screen comprises a Picture-in-Picture screen.
 40. The method of claim 38, wherein the logical screen comprises a Picture-outside-Picture screen.
 41. A method of providing multiple screens, the method comprising: generating a logical screen for displaying a service and a display screen to which the logical screen is mapped; and disposing the logical screen on the display screen according to a disposing method among a plurality of disposing methods.
 42. The method of claim 41, wherein the disposing methods comprise: a first disposing method of displaying the service on the display screen; a second disposing method in which the display screen according to the first disposing method exists with at least one overlapped screen; a third disposing method in which the screen on which the service is displayed corresponds to a logical screen that is mapped with an overall region of the display screen, the screen on which the service is displayed corresponds to at least one non-overlapped logical screen mapped with the display screen, and the screen on which the service is displayed does not correspond to the overlapped screen; a fourth method in which the screen according to the third method exist with at least one overlapped screen; a fifth method in which the screen on which the service is displayed corresponds to at least two non-overlapped logical screens mapped with the overall region of the display screen but does not correspond to the overlapped screen; a sixth method in which the screen according to the fifth method exists with at least one overlapped screen; and a seventh method in which the screen on which the service is displayed is not included in the first to sixth methods.
 43. The method of claim 41, wherein the logical screen comprises a Picture-in-Picture screen.
 44. The method of claim 41, wherein the logical screen comprises a Picture-outside-Picture screen.
 45. The method of claim 41, wherein the disposing of the screens with reference to a right range of an application included in the service.
 46. The method of claim 41, wherein the disposing method is selected by the application included in the service or a user.
 47. A method of providing multiple screens, the method comprising: generating at least one screen for displaying a service; and restricting execution of an application included in the service on the screen.
 48. The method of claim 47, wherein the screen comprises a Picture-in-Picture screen.
 49. The method of claim 47, wherein the screen comprises a Picture-outside-Picture screen.
 50. The method of claim 47, wherein the restricting the execution of the application restricts the execution of the application included in the service on the screen regardless whether a signal for indicating that the application can be executed on the screen is included in the service. 